Twyee



UNITED STATES PATENT o'EEioE.

GEO. D. MILLER, OF YEWVy BERLIN, PENNSYLVANIA.

TWYER.

' Specification of Letters Patent No. 10,367, dated January 3, 1854.

To all whom t mag/'concern Be it known'that I, GEORGE D. MILLER, of New Berlin, in the county of Union and State of Pennsylvania, have invented a new and useful Improvement in Twyers; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, forming part of this specification, in which- Figure l is a plan of the apparatus. Fig. 2 is a vertical longitudinal section on line of Fig. l. Fig. 3 is a similar section showing the regulating cylinder in posit-ion to throw the blast through the front passage.

Similar characters of reference in the several figures denote the same part.

The object of my invention is to graduate the volume and intensity of the blast, and

also to convey it when desired to the middle or front of the hearth.

It consists in the employment in front of the ingress passage of a notched cylinder, for closing either partially or entirely the mouth of said passage, it being also so arranged as to enable the blast to issue from the top of the twyer, or from a passage terminating at the middle of the heart-h, according to the position of the graduating cylinders.

In the drawings a is the body of the twyer, I) is the ingress passage, o the opening at the top, and d the egress passage leading to the middle of the hearth.l lithin the box a and movable upon the journals e,

is the segment of cylinder f, having in one side the cavity or notch L. The bot-tom of the box isa slide m capable of being withdrawn by the handle n for removing the accumulation of foreign substances from the apparatus, the face Q of the segment of cylinder j' serving to convey varound and discharge upon the slide all ashes and other substances which may ent-er the apparatus from the top.

The operation of my twyer is as follows The apparatus is secured in the forge in the same manner as other twyers, the crank C and handle a being outside of the brick work so as to be readily operated.

The nozzle of the bellowsV is inserted in the ingress passage Z), and with the segment of cylinder f in the posit-ion shown in Fig. 2, will give a full blastto the forge through t-he top of the twyer. By revolving the cylinder in the direction indicated by arrow 1, the mouth of the passage Z) is gradually diminished and the intensity of the blast'consequently weakened. When the segment of cylinder' f. has the position shown in Fig. 3, the current takes the direction indicated by the blue arrows, and will be weakened in intensity and diminished in volume, as the segment f is revolved in the direction of arrow 2. The face q of the segment f relieves the twyer of ashes `and small cinders j by carrying them around and depositing them upon the slide my, which when with drawn, sufers the dirtI thus collected to drop to the ground.

The advantages of this twyer consist in the regulating of the volume as well as the intensity of the blast, and also in the facility f with which thev point of egress can be changed, which when large pieces of` iron are to be forged is of great importance, as they require the lire to be removed from: the

back of the forge 'and the heat to Ybe concentrated near the middle of the hearth. y

I do not claim the chamber a, passage I), outlet o, or Valve f,V as such are well known,

neither do I claim an additional outlet when. 1

governed by an additional cock or valve; but

lhat I claim as my invention and desire to secure by Letters Patent, is

The combina-tion ofthe notched segment GEORGE n. MILLER.

lVitnesses: v

GEO. PATTEN, BARLEY N. FERGUSON. 

